Have a close look at the startup screen when you switch the GPS on, it should show that the UK & Europe map is loading with a copy-write notice in small print.
Not having used or purchased foreign maps, I can't say for certain whether they should show up in the Maps list or not, although I would think they should.
Now from what I've read they should be there & selectable & you should be able to preview them in Trip Planning Mode.
Other possibility is the card is damaged/faulty, you can test for this by putting it in a card reader plugged into your PC & see if the card is recognised & view files / folders etc on card.
If you have (free program download - click on the link to view details); it will read the card & preview the maps for you which will also confirm whether the card is faulty or not.
BaseCamp can take some time to load large maps from Micro SDCard & GPS, so be patient.
Yes the GPS can be used as the card reader.
With BaseCamp you can also do trip planning & load routes to your Nuvi providing the Maps are working.
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